The equation y=-0.065x2+6.875x+6200 models the amount y of sugar (in pounds per square foot) produced where x is the amount of fertilizer (in pounds per square foot) used.
What is the best approximate for the amount of sugar produced when 3 pounds per square foot of fertilizer is used?
6200 lb/ft2
6210 lb/ft2
6220 lb/ft2
6230 lb/ft2
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